#!/bin/bash
# For all the following commands HOME should be set to the directory that has .my.cnf file with password information.


# Flexible parameter to determine database or table size. On the frontend side, use keys like mysql.size[zabbix,history,data].
# Key syntax is mysql.size[<database>,<table>,<type>].
# Database may be a database name or "all". Default is "all".
# Table may be a table name or "all". Default is "all".
# Type may be "data", "index", "free" or "both". Both is a sum of data and index. Default is "both".
# Database is mandatory if a table is specified. Type may be specified always.
# Returns value in bytes.
# 'sum' on data_length or index_length alone needed when we are getting this information for whole database instead of a single table
MYSQLD=`ps -e | grep -v grep |grep -c   mysqld_safe`

if [ ${MYSQLD} -lt 1 ]; then 
    exit 0
fi

function getMysqlStatus(){
    VALUE=`HOME=${MYSQL_HOME_PATH} mysqladmin ping 2> /dev/null | grep -c alive`
    echo ${VALUE}
}

if [[ $(getMysqlStatus) = "1" ]]; then
    bash -c 'echo "select sum($(case "$3" in both|"") echo "data_length+index_length";; data|index) echo "$3_length";; free) echo "data_free";; esac)) from information_schema.tables$([[ "$1" = "all" || ! "$1" ]] || echo " where table_schema=\"$1\"")$([[ "$2" = "all" || ! "$2" ]] || echo "and table_name=\"$2\"");" | HOME=${MYSQL_HOME_PATH} mysql -N'
fi